Climate change is happening now and greenhouse gas emissions from human activities are the dominant cause. Climate change will continue over the decades and centuries to come in the absence of significant emission reductions.

This is the most significant report from the IPCC since its 4th Assessment Report in 2007 and its assessment of the state of the climate is the most comprehensive ever written and provides a strengthened body of evidence of man-made climate change since its last major review almost six years ago. 259 experts from 39 countries reached their conclusions by reviewing thousands of published research papers. The findings are agreed by governments of the member countries.

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